Elu Va'Elu Om'rim... "Ashrei Mi Shelo Chata, U'mee She'Chata Yashuv, V'Yimchal Lo."
אלו ואלו אומרים... "אשרי מי שלא חטא, ומי שחטא ישוב, וימחל לו."
There were those who used to say... "Fortunate is he who does not have sin, and he who sins should repent, and he (his sins) will be forgiven."
A Chasidic song inspiring people to repent.
Words from Babylonian Talmud, Tractate Sukkah, Page 53(a)